Home / 100,421.06-138,582.44-55,098.18

Finding the Fourth Proportional to 100,421.06, 138,582.44 and 55,098.18

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Solution

The fourth proportional to 100,421.06, 138,582.44 and 55,098.18 is: 76,036.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,421.06 : 138,582.44 = 55,098.18 : x
  2. Step 2: Convert to fraction form
    100,421.06/138,582.44 = 55,098.18/x
  3. Step 3: Cross multiply
    100,421.06x = 138,582.44 × 55,098.18
  4. Step 4: Simplify right side
    100,421.06x = 7,635,640,223.96
  5. Step 5: Solve for x
    x = 7,635,640,223.96/100,421.06
  6. Step 6: Final answer
    x = 76,036.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.